multithreading - multiple threads calling wcf service -

below simple code start 5 threads, each 1 calls wcf service returns value sent in, problem :

public void clien_getdatacompleted(object sender, getdatacompletedeventargs e)         {             lock (sync)             {                 count += e.result;             }         } 

works ok , increments count, how capture when threads have completed, have simple example code on how call multiple wcf services use async methods.

public partial class threading : form {         public int count;         servicereference1.service1client clien = new servicereference1.service1client();          public threading()         {             initializecomponent();         }          private void getdata()         {             clien.getdataasync(1);         }          public void displayresults()         {             messagebox.show(count.tostring());         }          private object sync = new object();          public void clien_getdatacompleted(object sender, getdatacompletedeventargs e)         {             lock (sync)             {                 count += e.result;             }         }          public list<thread> runthreads(int count, threadstart start)         {             list<thread> list = new list<thread>();             (int = 0; <= count - 1; i++)             {                 dynamic thread = new thread(start);                 thread.start();                 list.add(thread);             }             return list;         }          private void button1_click_1(object sender, eventargs e)         {             clien.getdatacompleted += new eventhandler<getdatacompletedeventargs>(clien_getdatacompleted);             threadstart wcfcall = new threadstart(getdata);             ilist<thread> threads = runthreads(5, wcfcall);         }      } 

many thanks

if using .net 4.0 can use task parallel library (tpl) , use tasks instead of threads. tasks has more flow control. can tasks like

  // wait tasks finish.   task.waitall(tasks); 

here example on how use tasks , wait tasks finish. here